[SPARK-22263] Refactor deterministic as lazy value

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.2.0
• Fix Version/s: 2.3.0
• Component/s: SQL
• Assignee: Gengliang Wang
• Reporter: Gengliang Wang
• Created: 12/Oct/17 07:38
• Updated: 13/Oct/17 01:48
• Resolved: 13/Oct/17 01:48

Description

The method `deterministic` is frequently called in optimizer.
Refactor `deterministic` as lazy value, in order to avoid redundant computations.

Issue Links

• links to: [Github] Pull Request #19478 (gengliangwang)